diff --git a/lib2/bar.hh b/lib2/bar.hh
index 55ffd25..8164dcc 100644
--- a/lib2/bar.hh
+++ b/lib2/bar.hh
@@ -1,2 +1,3 @@
+#pragma once
 /** very important function */
 void showNyanCat();
diff --git a/lib2/foo.hh b/lib2/foo.hh
index 12baafa..6599830 100644
--- a/lib2/foo.hh
+++ b/lib2/foo.hh
@@ -1,2 +1,3 @@
+#pragma once
 /** foo foo foo */
 int frob();
diff --git a/src/foo.cc b/src/foo.cc
index e1dcf7e..bd51fac 100644
--- a/src/foo.cc
+++ b/src/foo.cc
@@ -1,5 +1,9 @@
 #include "lib2/foo.hh"
+#include "wat.hh"
 
 void thingy() {
     frob();
+    wat();
+    showNyanCat();
+    lolwut();
 }
diff --git a/src/nya.hh b/src/nya.hh
new file mode 100644
index 0000000..15565ef
--- /dev/null
+++ b/src/nya.hh
@@ -0,0 +1,2 @@
+#pragma once
+int lolwut();
diff --git a/src/wat.hh b/src/wat.hh
new file mode 100644
index 0000000..4e86a0f
--- /dev/null
+++ b/src/wat.hh
@@ -0,0 +1,2 @@
+#pragma once
+int wat();